[X4U] Screwy Mac mini

[Joe Sporleder]

We've got an Intel Mac mini, 2 GB of RAM, running MacOS X 10.4.11. It  
is primarily used as a basic Internet machine, plus iCal. It has  
difficulty shutting down. When ever I tell it to shutdown or restart  
directly through the Finder or via Remote Desktop, it simply restarts  
the Finder, instead of restarting or shutting down the machine. Anyone  
ever seen this kind of behavior before, and what could be the problem  
and solution?

Joe